function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abotsi, Komla Elikplim & Kokou, Kouami & Dubuisson, Jean-Yves', 10],
    ['Becherer', 1],
    ['Brause, Guido Georg Wilhelm', 1],
    ['Christ, Konrad Hermann Heinrich', 1],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 6],
    ['Jeanmonod, Daniel', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 1],
    ['Mazumdar, Jaideep & Callmander, Martin W. & Fumeaux, Nicolas', 2],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 3],
    ['Petchsri, Sahanat & Zhang, Li-Bing & Jaruwattanaphan, Tassanai', 1],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);